Of course you knew the correct answer without even asking. But I question part of your initial statement:
he will be bigger next year, do not risk getting in trouble with the law and the club.
To rationalizethis by saying that 1)he'll be bigger and 2)you might get into trouble is to not shoot for all the wrong reasons. Plain and simple, all buck tags were used andit would have been illegal to shoot him. The thought process doesn't need to go any further than that.